Etherified cation exchanging phenol-formaldehyde resins



sentially diminished. Indeed, calculated on the Patented Oct. 21, 1941 ETHERIFIED CATION EXCHANGING PHE- NOL-FORMALDEHYDE RESINS Hans Wassenegger, Dessau in Anhait, and Erhar Meier, Bitterfeld, Germany 1 No Drawing. Application July 7, 1938, Serial No. 218,014. In Germany July 13, 1937 w 2 Claims. (Cl. 260-49) The present invention relates to a method for resin. The resin produced by the aforementioned diminishing the swelling oi phenol resins in condensation contains o-sulfonic acid groups due aqueous solutions. to the use of the sodium sulflte.

Phenol artificial resins, that is to say condensation products from monohydric and/or 5 Swelling percent polyhydric phenols which contain u sulfonic acid Pmduced groups with aldehydes or their equivalents have noun treated with Water generally the disturbin quality of more or less gigg gag swelling in contact with water, alkalies or acids. acid 1:1 1/10N This property is especially troublesome in the A case of resins which have a gel character and Untreated no 40 225 are useful as cation exchangers. if g g gfig g g g This invention relates to a method of eiiminatgr g i n c gl lglel a 1;:

ing to a great extent this defect which consists in after-treating the resin with an etherii'ying ien i etiiz o .ti ffi ffifl ffn 44 44 4s agent. The usual etherifying agents are suitable '0 th m for example a ky d S The invention is not limited to the exact de- 88 e y chloride, methylene o e. alkyl 5 11- tails described, for obvious modifications will ociates, toluene sulionic esters or the like. When our to a person skilled in the art. a cation exchanger is treated with such etherity- What we claim is: Y in: a ents its capac y is surprisin ly not es- 1. Insoluble cation exchanging resins comprising phenol-formaldehyde resins containing u-Slllv lume, it is r h increesed- If fi y active fonic acid groups and etherifled phenolic hydroxy sroup. or st e. su c acid r u s. a groups. said resins being obtained by etherifying been b oc ed by t e e flca a su sequent phenolic hydroxy groups of insoluble formaldesaponifying treatment may beapplied. hyde-phenol resins containing u-sulfonic acid For e p e resin e by condensing the groups, said resins having little tendency to swell solution of 287 parts of 1'6501011101 and 132 parts in the presence of aqueous solutions of sodium sulflte in 530 parts of water :with 500 2, The pmducts defined i l i 1, h i parts 0! iormaline or per cent. strength is 30 said, etherifled phenolic hydroxy groups are dried and comminuted and separate portions chlormethoxy groups and wherein the etheriare treated with the compounds espec vely flcation is effected by means of methylene named in the following table. In each' case chloride. there is an essential diminution of the capacity HANS WASSENEGGER. for swelling as compared with the untreated ERHARD MEIER. 

